1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Electric field inside concentric solenoids

  1. Oct 6, 2016 #1
    1. The problem statement, all variables and given/known data
    Dr. X has an infinitely long superconducting solenoid with n turns per unit length and a power supply to drive arbitrary current wave forms through the solenoid's winding. The power supply can drive DC currents, temporarily ramped currents, sine wave currents, etc....; whatever Dr. X programs it to do. Dr. Y wants to accelerate some electrons on the circumference with radii a and b as shown in the figure. Dr. X says that Dr. Y is nuts; you cannot create an electric field with the superconducting solenoid and the power supply.

    Can Dr. Y produce an electric field on the two circumferences? If Dr. Y cannot produce an electric field, prove it. If Dr. Y can produce an electric field explain how and calculate the electric field on the circumferences with radii a and b shown in the figure.

    2. Relevant equations/information
    https://drive.google.com/open?id=0B818Uj3Z5tjAQUtJTjA4V1R5RXVkaWN0VFFfMldFTF95OWZZ (Sorry, I guess my image won't load)
    If such a field were possible both would be time varying due to the multiple programmable options on the power supply and so the electromagnetic 'news' would travel at the speed of light.

    3. The attempt at a solution

    I can find the electric field without problem. What I am unsure of is whether or not it is even possible with this configuration.
  2. jcsd
  3. Oct 6, 2016 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Without a figure we cannot figure out what "this configuration" is.
  4. Oct 6, 2016 #3


    User Avatar

    Staff: Mentor

    Your URL seems to resolve to a google drive location, and may not be public accessible. A better option is to UPLOAD the image (use the UPLOAD button at the bottom right of the edit panel), or perhaps a screen capture cut&paste.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted